| 宋云红,陈浩,张晋言,王颖,王秀明.各向异性联合反演的数值研究*[J].,2018,37(5):794-800 |
| 各向异性联合反演的数值研究* |
| Simulation of simultaneous inversion of formation shear-wave anisotropy |
| 投稿时间：2018-06-13 修订日期：2018-08-06 |
| 中文摘要: |
| 各向异性的探测在油气藏的勘探开发中有着十分重要的影响。针对正交偶极子声波测量的四分量数据,目前广泛应用的各向异性反演方法为三参数联合反演的方法。该方法的目标函数由两部分构成：一部分是基于四分量旋转得到的快慢横波波形匹配的拟合函数(简称主函数),另一部分是主函数对方位求导后得到的辅助拟合函数(简称辅助函数)。本文深入研究了主函数与辅助函数以及二者的和(简称综合函数)随各向异性参数的变化特性与规律。数值模拟表明主函数主要对各向异性大小敏感,对于方位的敏感度较差；辅助函数对于方位的敏感性较好,对于各向异性大小的敏感度则较差。综合函数对慢度差与快横波方位的灵敏度都有较好的敏感性,可以反演出各向异性的大小和方位。 |
| 英文摘要: |
| The exploration of anisotropy has a very important influence on the exploration and development of oil and gas reservoirs. In view of the four-component data of the cross-dipole acoustic wave measurement, simultaneous inversion method is widely used to inverse the formation shear-wave anisotropy. The objective function of this method consists of two parts: one part is the fitting function (referred to as the principal function) based on the fast and slow shear waves’ waveform matching obtained by four-component rotation; the other part is the auxiliary fitting function obtained after the principal function derivation of azimuth (abbreviated auxiliary function). In this paper, the characteristics and laws of the variation of the principal and auxiliary functions, and the sum of the two functions (called comprehensive function) with the anisotropic parameters are further studied. The results of numerical simulation show that the principal function is mainly sensitive to the anisotropy, and the sensitivity to the azimuth is poor; the auxiliary function is sensitive to the azimuth, while the sensitivity to anisotropy is not so good. The comprehensive function is sensitive to both the anisotropy and azimuth, so it can inverse the anisotropy and azimuth. |
| DOI：10.11684/j.issn.1000-310X.2018.05.027 |
| 中文关键词: 正交偶极 各向异性 联合反演 |
| 英文关键词: Cross-dipole Anisotropy Simultaneous inversion |
| 基金项目:国家自然科学基金项目 (11574347, 11774373, 11734017, 91630309) |
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